A double SXS with 22" tubes in .45/70 would make a terrific guide gun or general gun (for me) for hunting here in BC.
; I don't know what peressures the .45/70 version will take, but even if held to 35,000PSI, that will put a 350gr. out at 2,100fps or 400's at 1,900fps. WONDERFULL!